JPH10248041A - Video acoustic equipment with alarm function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the execution of alarm function at on-timer time regardlessly of the presence/absence of broadcasting radio waves by generating an alarm tone when the reception of no radio wave is judged for fixed time after the ON of power source at the set time of on-timer function. SOLUTION: When the on-timer time stored in an on-timer time storage part 17 is coincident with present time, a received radio wave discrimination circuit 14 operates a timer circuit 16 to start the measurement of fixed time and during that operation, the presence/absence of synchronizing detecting signal or voice detecting signal inputted from a synchronizing signal detection circuit 12 or a voice signal detection circuit 13 is discriminated. When there is no broadcasting radio wave of reception channel at the on-timer time, the received radio wave discrimination circuit 14 outputs a discriminate signal showing the absence of synchronizing detecting signal or voice detecting signal, and a system controller 15 outputs a control signal to an alarm tone generation circuit 11 and generates the alarm tone from the alarm tone generation circuit 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video and audio equipment having an on-timer function for automatically turning on a power supply at a preset time and starting reception of broadcast radio waves,
More specifically, the present invention relates to a video and audio device with an alarm function that operates an alarm function in association with an on-timer function.

[0002]

2. Description of the Related Art Conventional video and audio equipment (for example, a television receiver) having an on-timer function for automatically turning on a power supply at a preset time and starting to receive broadcast radio waves, such as a television receiver. The on-timer function may be used as an alarm function. For example, when it is desired to get up at 6:00 in the morning on a business trip or the like, the power-on time of a television receiver (hereinafter, simply referred to as a television) is set to 6:00 in the morning using the on-timer function. In this way, morning 6
When the time comes, the power of the television is automatically turned on, and the sound or music being broadcast is output from the built-in speaker, so that the sound or music can be awakened as an alarm sound.

[0003]

However, although the recent broadcast start time of each broadcasting station is advancing year by year, even if the on-timer function is set, for example, when it is desired to wake up at 4:00 in the early morning, the power supply is not changed. If the station is set to receive the radio wave of a station that has not started broadcasting at the time of turning on, only a noise sound such as “Z” is output from the internal speaker. Further, those having the blue-back function are completely silent. In such a case, the alarm function cannot be performed at all.

Therefore, in order to avoid the occurrence of such a situation, when the on-timer function is to be used as an alarm function, the user checks in advance whether or not there is a broadcast at a time to be set in a program table or the like. There is a need. Also,
If there is no broadcast at the time when the on-timer is to be set, the on-timer function cannot be used as an alarm function, so that it is necessary to separately set an alarm clock or the like.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. An object of the present invention is to set a power-on time by an on-timer function, and a broadcast station transmits a radio wave at the set power-on time. If not, an object of the present invention is to provide a video and audio device with an alarm function that operates a built-in alarm function.

[0006]

According to a first aspect of the present invention, there is provided a video and audio equipment with an alarm function, which automatically turns on a power supply at a preset time to transmit broadcast radio waves. In an audiovisual device having an on-timer function for starting reception, an alarm sound generation unit for generating an alarm sound, and for a predetermined time after turning on the power at a time set by the on-timer function, the reception radio wave A received radio wave discriminating unit for discriminating presence / absence, and an alarm control unit for generating an alarm sound from the alarm sound generating unit and outputting from an internal speaker when the received radio wave discriminating unit determines that no radio wave has been received for a predetermined time. And a configuration including: According to a second aspect of the present invention, in the audiovisual apparatus with an alarm function according to the first aspect, the received radio wave discriminating unit determines the presence or absence of a received radio wave based on the presence or absence of a synchronization signal. According to a third aspect of the present invention, in the audiovisual apparatus with an alarm function according to the first aspect, the received radio wave discriminating unit determines presence or absence of a received radio wave based on a level of a received electric field intensity. According to a fourth aspect of the present invention, there is provided the audiovisual apparatus with an alarm function according to the first aspect, wherein the received radio wave discriminating unit determines the presence or absence of a received radio wave based on the presence or absence of an audio signal. Also, claim 5 of the present invention
The audiovisual device with an alarm function according to claim 1, wherein the received radio wave discriminating unit discriminates between the presence or absence of a synchronization signal and the presence or absence of an audio signal in at least the absence of a synchronization signal or an absence of an audio signal. When it is determined, it is determined that there is no received radio wave. Further, the video and audio equipment with an alarm function according to claim 5 of the present invention is characterized by claim 1.
In the description, the received radio wave discriminating unit, by determining the level of the received electric field strength and the presence or absence of an audio signal, when it is determined that at least the received electric field strength is below a certain level or no audio signal, there is no received radio wave. To judge.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an electrical configuration of an audiovisual apparatus with an alarm function according to an embodiment of the present invention. When a preset time comes, the power is automatically turned on to receive broadcast radio waves. Is applied to a television receiver having an on-timer function for starting the operation.

In FIG. 1, an output of a tuner circuit 2 to which a receiving antenna 1 is connected is connected to an intermediate frequency amplifier circuit 3, and a video output from the intermediate frequency amplifier circuit 3 is transmitted through a video detection circuit 4. It is connected to the video signal processing circuit 5. The output of the video signal processing circuit 5 is guided to the receiver 6 as RGB primary color signals. On the other hand, the audio output from the intermediate frequency amplification circuit 3 is connected to the terminal a of the changeover switch 8 via the audio detection circuit 7. The output of the alarm sound generation circuit 11 is connected to the terminal b of the changeover switch 8, and the common terminal c of the changeover switch 8 is
It is led to a speaker 10 via a low frequency amplifier circuit 9.

The output of the video signal processing circuit 5 is guided to a synchronization signal detection circuit 12, and the output of the audio detection circuit 7 is guided to an audio signal detection circuit 13.
The output of the synchronization signal detection circuit 12 and the output of the audio signal detection circuit 13 are guided to a received radio wave discrimination circuit 14. The received radio wave discriminating circuit 14 is bidirectionally connected to a system controller 15 and a timer circuit 16 for controlling the operation of the entire television receiver.

An on-timer time storage unit 17 for storing the set on-timer time is bidirectionally connected to the system controller 15, and the output of the key input unit 18 and the output of the clock unit 19 are connected to each other. Led,
A control signal is output from the system controller 15 to each of the tuner circuit 2, the changeover switch 8, and the alarm sound generation circuit 11. Key input unit 18
Although not shown, is provided with a mode setting key for setting the device to an on-timer mode, a numeric keypad used for inputting an on-timer time, and the like.

When a key operation signal indicating the on-timer mode is input from the key input section 18, the system controller 15 stores the subsequently input on-timer time in the on-timer time storage section 17, and stores the stored on-timer time. The timer time is compared with the current time measured by the clock unit 19, and when the stored on-timer time matches the current time, a power source (not shown) is automatically turned on to receive broadcast radio waves. To get started. When the on-timer time and the current time match, the system controller 15 outputs a control signal to the received radio wave discriminating circuit 14 to operate the received radio wave discriminating circuit 14. Further, the system controller 15 controls the operation of the alarm sound generation circuit 11 and the switching control of the changeover switch 8 based on the determination signal output from the received radio wave determination circuit 14.

When detecting a synchronization signal included in the video signal, the synchronization signal detection circuit 12 outputs a synchronization detection signal to the received radio wave discriminating circuit 14. The audio signal detection circuit 13
When an audio signal including music and the like detected by the audio detection circuit 7 is detected, the audio detection signal
Output to

The received radio wave discriminating circuit 14 has a timer circuit 16 based on a control signal from the system controller 15.
To start measurement for a certain period of time (for example, 5 seconds), and to determine the presence or absence of a synchronization detection signal or an audio detection signal input from the synchronization signal detection circuit 12 or the audio signal detection circuit 13 during that time. When it is determined that there is no detection signal or voice detection signal, a determination signal indicating that there is no signal is output to the system controller 15.

Next, the operation of the above-configured television receiver in the on-timer setting mode will be described with reference to the flowchart shown in FIG. The changeover switch 8 is normally connected to the common terminal c on the terminal a side so that the audio signal detected by the audio detection circuit 7 is appropriately amplified by the low-frequency amplification circuit 9 and output from the speaker 10. Has become.

In this state, when a key operation signal indicating the on-timer mode is input from the key input unit 18,
The system controller 15 stores the subsequently input on-timer time in the on-timer time storage unit 17, and starts comparing the stored on-timer time with the current time measured by the clock unit 19 (step S1). . Then, when the stored on-timer time matches the current time (step S2), the power supply (not shown) is automatically turned on to start receiving the broadcast wave (step S2).
3).

At this time, the system controller 15
A control signal is output to the received radio wave discriminating circuit 14 to operate the received radio wave discriminating circuit 14. The received radio wave discriminating circuit 14
The timer circuit 16 is operated based on a control signal from the system controller 15 for a predetermined time (for example, 5 seconds).
Is started, and it is determined whether there is a synchronization detection signal or an audio detection signal input from the synchronization signal detection circuit 12 or the audio signal detection circuit 13 during the measurement (step S).
4, S5).

In this case, if there is a broadcast wave of the receiving channel at the time of the on-timer, the synchronization signal detecting circuit 12
Output a synchronization detection signal from the audio signal detection circuit 1
Since the voice detection signal is output from the receiver 3, the received radio wave discrimination circuit 14 determines that there is a synchronization detection signal or a voice detection signal, and outputs a determination signal indicating the presence of the synchronization detection signal or the voice detection signal to the system controller 15. . When the system controller 15 receives the synchronization detection signal or the determination signal indicating the presence of the voice detection signal, the system controller 15 maintains the state as it is (step S6). This allows
A sleeping user can wake up using music or voice of a receiving channel output from a speaker as an alarm sound.

On the other hand, if there is no broadcast wave on the reception channel at the time of the on-timer, the synchronization signal detection circuit 12 does not output the synchronization detection signal, and the audio signal detection circuit 13
The received radio wave discriminating circuit 14 determines that there is no synchronization detection signal or voice detection signal, and outputs a determination signal indicating that there is no synchronization detection signal or voice detection signal to the system controller 15.

When the system controller 15 receives the discrimination signal indicating that there is no synchronization detection signal or voice detection signal, it outputs a switching control signal to the changeover switch 8 to switch the common terminal c to the terminal b side (step S
7), outputting a control signal to the alarm sound generation circuit 11,
An alarm sound is generated from the alarm sound generation circuit 11 (step S8). Thereby, the alarm sound generation circuit 1
The alarm sound generated from 1 is input to the low-frequency amplifier circuit 9 via the terminals bc of the changeover switch 8, where it is appropriately amplified and output from the speaker 10. for that reason,
The sleeping user can wake up by hearing the alarm sound.

In the above-described embodiment, the received radio wave discriminating circuit 14 discriminates both the presence or absence of the synchronization detection signal and the presence or absence of the audio detection signal. You may comprise so that only the presence or absence of a signal may be determined. However, discrimination of both the synchronization detection signal and the audio detection signal allows the switching control of the changeover switch 8 to be performed more reliably. For example, when the audio signal detection circuit 13 erroneously detects a special noise component as an audio signal and outputs an audio detection signal,
This is because when the received radio wave discriminating circuit 14 checks only the presence or absence of the voice detection signal, the switching control of the changeover switch 8 is not performed, so that only the noise sound is output from the speaker 10 indefinitely.

FIG. 3 is a block diagram showing an electric configuration of a video and audio device with an alarm function according to another embodiment of the present invention. When a preset time comes, the power is automatically turned on to broadcast. The case where the present invention is applied to a radio receiver having an on-timer function for starting radio wave reception is illustrated.

In the figure, an output of a tuner circuit 22 to which a receiving antenna 21 is connected is supplied to an intermediate frequency amplifying circuit 23.
The audio output from the intermediate frequency amplification circuit 23 is connected to a terminal a of a changeover switch 25 via an audio detection circuit 24. The output of an alarm sound generation circuit 28 is connected to a terminal b of the changeover switch 25, and a common terminal c of the changeover switch 25 is guided to a speaker 27 via a low frequency amplification circuit 26.

The output of the intermediate frequency amplifying circuit 23 is guided to a reception electric field strength detection circuit 29, and the output of the sound detection circuit 24 is guided to a sound signal detection circuit 30. The output of the detection circuit 29 and the output of the audio signal detection circuit 30 are guided to a received radio wave discrimination circuit 31. The received radio wave discriminating circuit 31 is provided with a system controller 32 for controlling the operation of the entire radio receiver.
And the timer circuit 33 in both directions.

An on-timer time storage unit 34 for storing the set on-timer time is bidirectionally connected to the system controller 32. The output of the key input unit 35 and the output of the clock unit 36 are connected to each other. Led,
A control signal is output from the system controller 32 to each of the tuner circuit 22, the changeover switch 25, and the alarm sound generation circuit 28. Key input unit 3
Although not shown, 5 includes a mode setting key for setting the device to the on-timer mode, a numeric keypad used for inputting the on-timer time, and the like.

When a key operation signal indicating the on-timer mode is input from the key input unit 35, the system controller 32 stores the subsequently input on-timer time in the on-timer time storage unit 34, and stores the stored on-timer time. The timer time is compared with the current time measured by the clock unit 36, and when the stored on-timer time matches the current time, the power supply (not shown) is automatically turned on to receive the broadcast wave. To get started. When the on-timer time matches the current time, the system controller 32 outputs a control signal to the received radio wave discriminating circuit 31 to operate the received radio wave discriminating circuit 31. Further, the system controller 32 controls the operation of the alarm sound generation circuit 28 and the switching control of the changeover switch 25 based on the determination signal output from the received radio wave determination circuit 31.

The reception electric field strength detection circuit 29 detects the level of the intermediate frequency signal (that is, the level of the intensity of the reception radio wave), and when the detection level exceeds a certain reference level, the broadcast radio wave of the reception channel is detected. Is received, the reception electric field strength detection signal is
Output. Audio signal detection circuit 30
Is configured to output a voice detection signal to the received radio wave discriminating circuit 31 when detecting a voice signal including music or the like detected by the voice detection circuit 24.

The received radio wave discriminating circuit 31 is controlled by a timer circuit 33 based on a control signal from the system controller 32.
To start measurement for a certain period of time (for example, 5 seconds), and to determine the presence or absence of a reception field strength detection signal or a voice detection signal input from the reception field strength detection circuit 29 or the voice signal detection circuit 30 during that time. When it is determined that there is no received electric field strength detection signal or voice detection signal, a determination signal indicating that there is no signal is output to the system controller 32.

Next, the operation of the above-configured radio receiver in the on-timer setting mode will be described with reference to the flowchart shown in FIG. The changeover switch 28 has a common terminal c connected to the terminal a, so that the audio signal detected by the audio detection circuit 24 is appropriately amplified by the low-frequency amplification circuit 26 and output from the speaker 27. Has become.

In this state, when a key operation signal indicating the on-timer mode is input from the key input unit 35,
The system controller 32 stores the subsequently input on-timer time in the on-timer time storage unit 34, and starts comparing the stored on-timer time with the current time measured by the clock unit 36 (step S11). .
Then, when the stored on-timer time matches the current time (step S12), the power supply (not shown) is automatically turned on to start receiving the broadcast wave (step S12).
13).

At this time, the system controller 32
A control signal is output to the received radio wave discriminating circuit 31 to operate the received radio wave discriminating circuit 31. The received radio wave discriminating circuit 31
Based on a control signal from the system controller 32, the timer circuit 33 is operated for a predetermined time (for example, 5 seconds).
Is started, and the presence or absence of the received electric field strength detection signal or the audio detection signal input from the received electric field strength detection circuit 29 or the audio signal detection circuit 30 is determined (steps S14 and S15).

In this case, if there is a broadcast wave of the reception channel at the time of the on-timer, the reception electric field intensity detection circuit 29 outputs the reception electric field intensity detection signal, and the audio signal detection circuit 30 outputs the audio detection signal. Therefore, the reception radio wave discrimination circuit 31 determines that there is a reception electric field strength detection signal or a voice detection signal, and outputs a discrimination signal indicating the presence of the reception electric field strength detection signal or the voice detection signal to the system controller 32.

When the system controller 32 receives the received electric field strength detection signal or the discrimination signal indicating the presence of the voice detection signal, the system controller 32 maintains the state as it is (step S16). This allows the sleeping user to:
It is possible to wake up using the music or voice of the receiving channel output from the speaker as an alarm sound.

On the other hand, if there is no broadcast wave on the reception channel at the time of the on-timer, the reception electric field strength detection circuit 29
Does not output the reception electric field strength detection signal from the receiver, and the sound signal detection circuit 30 does not output the sound detection signal. Therefore, the reception radio wave discrimination circuit 31 determines that there is no reception electric field strength detection signal or sound detection signal, and A determination signal indicating no electric field strength detection signal or no voice detection signal is output to the system controller 32.

When the system controller 32 receives the received electric field strength detection signal or the discrimination signal indicating that there is no voice detection signal, it outputs a switching control signal to the changeover switch 25 to switch the common terminal c to the terminal b side. (Step S17), a control signal is output to the alarm sound generation circuit 28, and the alarm sound generation circuit 28 generates an alarm sound (Step S18). As a result, the alarm sound generated from the alarm sound generation circuit 28 is input to the low-frequency amplifier circuit 26 via the terminals bc of the changeover switch 25, where it is appropriately amplified and output from the speaker 27. Therefore, the sleeping user can wake up by hearing the alarm sound.

In the above embodiment, the reception radio wave discriminating circuit 31 discriminates both the presence or absence of the reception electric field strength detection signal and the presence or absence of the voice detection signal.
It may be configured to determine only the presence or absence of the reception electric field strength detection signal or only the presence or absence of the voice detection signal. However, discriminating both the received electric field strength detection signal and the voice detection signal allows the switching control of the changeover switch 25 to be performed more reliably. For example, when the audio signal detection circuit 30 erroneously detects a special noise component as an audio signal and outputs an audio detection signal, the reception radio wave discriminating circuit 31 checks only the presence or absence of the audio detection signal. In this case, since the switching control of the changeover switch 25 is not performed, only the noise sound is output from the speaker 27 indefinitely.

[0036]

According to the first aspect of the present invention, there is provided a video / audio device with an alarm function according to the first aspect of the present invention, which has an on-timer function for automatically turning on a power supply at a preset time to start receiving a broadcast wave. In an audio device, an alarm sound generation unit for generating an alarm sound, a reception radio wave discrimination unit for discriminating the presence or absence of a reception radio wave for a predetermined time after turning on the power at a time set by an on-timer function, When the radio discriminator determines that no radio wave has been received for a certain period of time, the alarm sound generator generates an alarm sound and outputs it from the internal speaker. Even if it is set to receive radio waves from stations that have not yet started broadcasting at the time, the alarm generated by the alarm sound generation unit It is possible to output the sound from the internal speaker. Therefore, regardless of the presence or absence of the broadcast wave, the music, voice, or alarm sound is reliably output from the speaker at the time of the on-timer, and the user wakes up by hearing the voice, music, or alarm sound. Is what you can do. In addition, the received radio wave discriminating unit of the audiovisual apparatus with an alarm function according to claims 2 to 4 of the present invention determines presence or absence of a received radio wave by any of the presence or absence of a synchronization signal, the presence or absence of an audio signal, and the level of the reception electric field strength. Because it is configured to determine, the presence or absence of the received radio wave can be determined reliably,
The alarm function can be reliably operated in conjunction with the on-timer function. The received radio wave discriminating unit of the audiovisual apparatus with an alarm function according to claim 5 or 6 of the present invention is configured to determine whether at least no synchronizing signal or no audio signal is present, or at least whether the received electric field strength is equal to or lower than a certain level or not. When it is determined that there is no radio wave, it is configured to determine that there is no received radio wave, so even if it is determined that there is an audio signal due to a special noise component, for example, the alarm function is reliably operated by linking with the on timer function That can be done.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electric configuration of a video and audio device with an alarm function according to an embodiment of the present invention;
This example illustrates a case where the present invention is applied to a television receiver having an on-timer function of automatically turning on a power supply at a preset time to start receiving a broadcast wave.

FIG. 2 is a flowchart illustrating an operation of an on-timer setting mode of the television receiver illustrated in FIG. 1;

FIG. 3 is a block diagram showing an electrical configuration of a video and audio device with an alarm function according to another embodiment of the present invention;
This example illustrates a case where the present invention is applied to a radio receiver having an on-timer function of automatically turning on a power supply at a preset time and starting reception of broadcast radio waves.

FIG. 4 is a flowchart illustrating an operation of an on-timer setting mode of the radio receiver illustrated in FIG. 3;

[Explanation of symbols]

 10, 27 Speaker 11, 28 Alarm sound generation circuit 12 Synchronous signal detection circuit 13, 30 Audio signal detection circuit 14, 31 Received radio wave discrimination circuit 15, 32 System controller (alarm control unit) 16, 33 Timer circuit 17, 34 On timer Time storage unit 18, 35 Key input unit 19, 36 Clock unit 29 Received electric field strength detection circuit

Claims (6)

[Claims] 1. An audio-visual device having an on-timer function for automatically turning on a power supply at a preset time to start receiving a broadcast wave, wherein: an alarm sound generating unit for generating an alarm sound; A received radio wave discriminator that determines the presence or absence of a received radio wave for a certain period of time after turning on the power at the time set by the on-timer function, and the received radio wave discriminator determines that no radio wave was received for a certain period of time And an alarm control unit that generates an alarm sound from the alarm sound generation unit and outputs the generated alarm sound from an internal speaker. 2. The received radio wave discriminating section discriminates the presence or absence of a received radio wave based on the presence or absence of a synchronization signal.
Audiovisual equipment with alarm function as described. 3. The audio-visual equipment with an alarm function according to claim 1, wherein the reception radio wave discriminating section discriminates the presence or absence of a reception radio wave based on a level of a reception electric field strength. 4. The reception radio wave discriminating section discriminates the presence or absence of a reception radio wave based on the presence or absence of an audio signal.
Audiovisual equipment with alarm function as described. 5. The received radio wave discriminating section discriminates between the presence or absence of a synchronization signal and the presence or absence of an audio signal, and at least when there is no synchronization signal or no audio signal, determines that there is no received radio wave. The audiovisual device with an alarm function according to claim 1. 6. The received radio wave discriminating section discriminates between the level of the received electric field intensity and the presence or absence of an audio signal. The audiovisual device with an alarm function according to claim 1, wherein the judgment is made.